JPH11279612A - Device for repairing refractory in mixer can and method for repairing refractory therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repairing device of a refractory in a mixer car, with which the automation of the repairing work of monolithic refractory in the mixer car can easily be obtd. and the good worked quality in the whole refractory can be held. SOLUTION: The refractory repairing device 11 is provided with a base block 21 for guiding an injecting nozzle 40 to the position of a molten iron receiving hole 2 in the torpedo car 1, an intermediate black 31 for inserting the injecting nozzle 40 into the mixer car 1 from the molten iron receiving hole 2 and a tip block 41 for rotation-driving the injecting nozzle 40 which the center axis of the mixer car 1 as the base axis at the time of injecting the monolithic refractory.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory repair apparatus and a refractory repair method for a refractory for repairing refractories installed inside a refractory car or the like.

[0002]

2. Description of the Related Art A refractory is installed on the inner surface of a steel shell of a mixed iron car for transporting molten iron to protect the same. This refractory is worn by hot metal and slag,
Conventionally, work for repairing worn and deteriorated refractories has been performed because of chemical deterioration. Conventionally, as a method of repairing refractories of a mixed iron car, a method of installing a core in a mixed iron car, pouring an irregular refractory between this core and a steel shell, and constructing a new refractory was there.

[0003] However, the refractory repair method using a core requires installation and removal of the core, resulting in poor work efficiency. In addition, since the hot metal outlet of the mixed iron car is narrow, the installation and removal work of the core sometimes requires dividing the mixed iron car into upper and lower parts, which is troublesome. In order to make up for the drawbacks of the refractory repair method using such a core, a repair method has been devised in which a blowing nozzle is inserted into the inside of a mixed iron vehicle from a hot metal inlet and outlet, and an irregular shaped refractory is sprayed on the inner surface of the mixed iron vehicle.

[0004] For example, Japanese Patent Publication No. 5-55796 discloses an invention relating to a "lining method for refractories in a furnace". The present invention relates to a lining device based on this stored address, in which the entire surface or an arbitrary portion of the refractory in the furnace is divided into a plurality of portions to determine addresses, and the addresses are stored in a computer or the like in advance. By operating the refractory lining on the surface of the refractory at a predetermined address. "And" The entire refractory surface in the furnace or an arbitrary portion is divided into a plurality of portions in advance to determine an address, and the address is determined. It is stored in advance in a computer or the like, and the television camera is moved based on the stored address, whereby the surface of the refractory in the furnace is photographed by the television camera, and the surface condition of the refractory is detected for each address. Lining the refractory on the surface of the refractory in the furnace at the required address. " According to the invention of this publication, it is possible to detect the surface of a refractory outside the furnace without a person directly entering the furnace, and to line an irregular-shaped refractory at a necessary place.

[0005]

Problems to be Solved by the Invention
In the invention disclosed in Japanese Patent No. 55796, although the lining device is automatically operated based on the pre-segmented address, the detection of the surface condition of the refractory is performed by remote visual observation using a television camera. Could only be detected. Therefore, it is difficult to determine the spray thickness of the irregular-shaped refractory, and it is difficult to confirm the construction quality because the perspective cannot be grasped with a television camera.

[0006] Further, since the thickness of the sprayed film is determined and checked after the spraying by a television camera, remote operation by the operator is inevitable, and the automation is merely an automation to the extent that a human does not need to enter the furnace directly. Furthermore, there is no idea to control the sprayed thickness in the entire range of the refractory, and in that sense, the repair method for the partial repair was to repair only the worn portion intensively.

[0007] On the other hand, in the case of a mixed-iron car, since the hot metal inlet and outlet are narrow, a general-purpose manipulator used for repairing a blast furnace tapping gutter or the like cannot be used, which is suitable for repairing irregular-shaped refractories in a mixed-iron car. The development of a spraying device has been desired.

[0008] The present invention has been proposed in view of the above problems, and can easily achieve the repair work of irregular shaped refractories in a mixed iron car, and maintain good construction quality in the entire refractories. It is an object of the present invention to provide a refractory repairing device that can perform the refractory repairing. In addition, it is possible to quantitatively detect the surface condition of the refractory of a mixed-iron car, control the sprayed thickness of the entire refractory, and achieve good construction quality by fully automatic repair. The aim is to provide a method.

[0009]

In order to achieve the above object,
The refractory repair apparatus for a mixed iron vehicle according to the present invention includes a base block that guides a spray nozzle to a receiving port of the mixed iron vehicle, an intermediate block that inserts the spray nozzle from the receiving port into the mixed iron vehicle, and an irregular refractory. And a tip block for rotating the spray nozzle about the central axis of the mixed iron wheel at the time of spraying.

[0010] In the refractory repairing apparatus, preferably, the base block includes a traveling means for traveling along the longitudinal direction of the mixed iron wheel, a traversing means for traversing the width of the mixed iron wheel, and a rotating mechanism. It is provided.

[0011] Preferably, the intermediate block is provided with elevating means for lowering the tip block to the center axis of the mixed iron wheel, and a plurality of rotatable joints.

Further, preferably, the tip block includes:
An expansion mechanism for expanding and contracting the joint, a plurality of rotatable joints, and a rotation mechanism for rotating the spray nozzle around the central axis of the mixed iron wheel are provided.

On the other hand, the method for repairing refractories of a mixed-iron vehicle according to the present invention sets a plurality of divided zones on the surface of the refractory in the mixed-iron vehicle, sets a repair thickness condition in each divided zone, and predicts the expected wear of the refractory. Create a pattern, measure the actual wear pattern of refractories with a profile meter after receiving and operating iron, compare the actual wear pattern with the expected wear pattern, select the optimal repair pattern, and set the repair thickness condition based on this. The setting is reset, and the automatic repair of the refractory is performed based on these conditions.

In the above refractory material repair method, preferably, the division zone is changed by resetting the repair thickness condition.

Preferably, the actual wear pattern is taken into an off-line three-dimensional simulator, and an optimal repair pattern is selected.

According to the refractory repair apparatus of the present invention, the base block guides the spray nozzle to the pouring port of the mixed iron wheel, and the intermediate block inserts the spray nozzle from the receiving port into the mixed iron car. When the refractory is sprayed, the tip block rotates the spray nozzle around the central axis of the mixed iron wheel.

That is, the longitudinal position of the mixed iron wheel is adjusted by the traveling means provided on the base block,
In addition, by adjusting the width direction position of the mixed iron wheel by the traversing means, and further adjusting the circumferential position by the rotating mechanism, the intermediate block, the tip block, and the spray nozzle provided thereon are guided to the pig iron receiving port. . Further, the tip block is lowered to the center axis of the mixed iron wheel by the lifting / lowering means provided on the intermediate block, and the tip block and the spray nozzle provided thereon are positioned and adjusted on the center axis by a plurality of rotatable joints. . Further, the tip block is extended and contracted by an extension mechanism to adjust the longitudinal position of the spraying nozzle, and a plurality of rotatable joints face the nozzle port to the refractory in the mixed iron wheel, and rotate around the central axis as a base axis. The spray nozzle is rotated by a mechanism.

As described above, the movement of the mixed iron wheel to the receiving port, the insertion from the receiving port into the mixed iron wheel, and the operation of spraying the irregular shaped refractory are respectively assigned to the respective blocks. Automation of the repair work of the refractory is easily achieved, and since the rotation center of the spray nozzle is fixed to the base shaft, good construction quality is maintained in the entire refractory.

On the other hand, according to the refractory repair method of the present invention,
First, a plurality of division zones are set on the surface of a refractory in a mixed iron vehicle, and a repair thickness condition in each division zone is set. This division zone is set based on the past operation results of the mixed iron vehicle, and the repair thickness condition is set based on the actual wear state. Further, an expected wear pattern of the refractory is created based on the actual wear state. And
After starting and operating the pig iron, the profile meter measures the actual wear pattern of the refractory. By comparing this actual wear pattern with the expected wear pattern created in advance,
The optimum repair pattern is selected, the repair thickness condition is reset based on the optimum repair pattern, and the refractory repair device performs automatic repair of the refractory based on the condition. By repeating such a repair cycle,
Spraying technology for spraying irregular shaped refractories,
Optimization can be achieved.

Further, in resetting the repair thickness condition, the repair zone condition is optimized by changing the division zone. Furthermore, by incorporating the actual wear pattern into the offline 3D simulator and selecting the optimal repair pattern, the simulator accuracy is improved, the service life of the repair is extended, and the operation guide is achieved, enabling effective repair. It is.

As described above, the actual wear pattern of the refractory is measured by the profile meter, so that the surface condition of the refractory of the mixed-iron car can be quantitatively detected, and based on the selected optimum repair pattern. Since the repair thickness condition of each division zone is reset, the spray thickness of the entire refractory is controlled, and good construction quality is achieved by fully automatic repair.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic front view showing an embodiment of a refractory repairing apparatus for a mixed iron wheel according to the present invention, FIG. 2 is a schematic plan view thereof, and FIG. 3 is a schematic side view thereof. As shown in the figure, the refractory repairing apparatus 11 of the present embodiment includes a base block 21 that guides a spray nozzle 40 and the like to a position of a receiving port 2 opened at an upper part of the mixed iron wheel 1, a receiving port 2 An intermediate block 31 for inserting the spray nozzle 40 and the like into the mixed iron wheel 1 from above, and a tip block for rotating the spray nozzle 40 with the central axis of the mixed iron wheel 1 as a base axis B when blowing the irregular refractory with the spray nozzle 40. 41 are provided.

The base block 21 is provided with traversing means 22 traversing along the width direction of the mixed iron wheel 1. The traversing means 22 is adapted to traverse on two traverse tracks 24a and 24b provided on the gantry 23 along the width direction of the mixed iron wheel 1, and a drive device (not shown) such as a servomotor. A traversing mechanism driven by the
Examples of the traversing mechanism include a gear mechanism and a chain mechanism.

The traverse tracks 24a and 24b are provided with traveling means 26 for traveling along the longitudinal direction of the mixed iron wheel 1. The traveling means 26 includes traversing tracks 24a, 24
a traveling mechanism (not shown) driven by a driving device 28 such as a servomotor, which travels on two traveling tracks 27a and 27b provided along the longitudinal direction of the mixed iron wheel 1 on the b. Is provided. Examples of the traveling mechanism include a gear reduction mechanism and a chain mechanism.

Further, on the traveling orbits 27a and 27b,
A rotation mechanism 30 that is driven to rotate by a drive device 29 such as a servomotor is provided. Examples of the rotation mechanism 30 include a gear reduction mechanism and a chain mechanism. Therefore, the position in the width direction of the mixed iron wheel 1 is adjusted by the traversing means 22 provided on the base block 21, the position in the longitudinal direction of the mixed iron wheel 1 is adjusted by the traveling means 26, and the circumferential position is adjusted by the rotating mechanism 30. By doing so, the intermediate block 31, the tip block 41, and the spray nozzle 40
Is guided to the receiving port 2.

The intermediate block 31 has a tip block 41.
Means 32 for lowering the iron to the position of the central axis of the pig iron wheel 1
Is provided. The elevating means 32 is configured to vertically move the intermediate feeder 33 by suspending it from above the gantry. For example, a rack-and-pinion or a chain mechanism is employed. The intermediate feeder 33 has a built-in means for transferring irregular-shaped refractories such as a screw feeder and a pressure feeding hose.

Below the intermediate feeder 33, a first intermediate joint 34 and a second intermediate joint 35 are rotatably provided. The first intermediate joint 34 is driven by a belt by a driving device 36 such as a servomotor. The second intermediate joint 35 forms a connection with the distal end block 41. As shown in FIG. 1, when the lower end of the intermediate feeder 33 rotates about the first intermediate joint 34 as a fulcrum, the tip block 41 and the spray nozzle 40 provided on the tip block 41 extend along the longitudinal direction of the mixed iron wheel 1. And move forward and backward. In the present embodiment, two joints are rotatably provided in the lower part of the intermediate feeder 33. However, the present invention is not limited to this, and three or more joints may be provided. Good.

Therefore, the tip block 41 is lowered to the center axis of the mixed iron wheel 1 by the lifting / lowering means 32 provided in the intermediate block 31, and the tip block is rotated by the first intermediate joint 34 and the second intermediate joint 35 which can rotate. 41 and the spray nozzle 40 provided thereon are positioned and adjusted to the center axis.

An extension mechanism 42 for extending and retracting the front end block 41 is provided at the rear portion. As shown in FIG. 4, the telescopic mechanism 42 includes a first-stage telescopic mechanism 44 that causes the first distal end feeder 43 to advance from the rear end of the distal end block 41, and a second distal end that extends from the first distal end feeder 43. It comprises a second-stage telescopic mechanism 46 for moving the feeder 45 forward. The first-stage expansion / contraction mechanism 44 is constituted by a first-stage rack and pinion driven by a drive device 47 such as a servomotor. The second-stage telescopic mechanism 46 is constituted by a second-stage rack-and-pinion driven by a drive device 48 such as a servomotor. In the present embodiment,
The tip block is provided with a two-stage expansion / contraction mechanism, but is not limited to this, and may be provided with one or three or more stages of expansion / contraction mechanisms.

The first tip feeder 43 and the second tip feeder 45 constituting the rear part of the tip block 41 are fixedly arranged so that the central axis of the mixed iron wheel 1 becomes the base axis B. Further, a weight 49 for balancing the block is attached to the rear end of the tip block 41.

A third tip feeder 50 and a spray nozzle 40 are disposed at a front portion of the tip block 41. The third tip feeder 50 has a first tip joint 51.
And a second distal joint 52 is rotatably provided. The first distal joint 51 forms a connection with the second distal feeder 45, and the second distal joint 52 forms a connection with the spray nozzle 40. The first tip joint 51 is provided with a rotation mechanism 53 that rotates the spray nozzle 40 with the central axis of the mixed iron wheel 1 as a base axis B.
The rotating mechanism 53 is configured by a gear mechanism that is driven to rotate by a driving device 54 such as a servomotor. That is, the first distal end joint 51 is disposed on the base axis B, and the third distal end feeder 50 is
And the spray nozzle 40 rotates.

The first tip feeder 43, the second tip feeder 45, and the third tip feeder 50 have a built-in means for transferring irregular-shaped refractories such as a screw feeder and a pressure feeding hose. A constant supply of irregular refractories is provided to 40.

Therefore, the distal end block 41 is expanded and contracted by the first-stage expansion and contraction mechanism 44 and the second-stage expansion and contraction mechanism 46 to adjust the longitudinal position of the spray nozzle 40, and the rotatable first distal joint 51 and The nozzle opening faces the refractory in the pig iron wheel 1 by the second tip joint 52, and the spraying nozzle 40 rotates around the base shaft B by the rotating mechanism 53.

Thus, the refractory repair apparatus 11 of the present embodiment
According to this, the blocks 21, 31, 41 are responsible for the movement of the pig iron wheel 1 to the pig iron receiving port 2, the insertion of the iron pig wheel 2 into the pig iron mixing car 1, and the blowing operation of the irregular shaped refractory, respectively. Therefore, it is possible to easily achieve the automation of the repair work of the irregular-shaped refractory in the mixed iron wheel 1, and since the rotation center of the spray nozzle 40 is fixed to the base shaft B, the good construction quality of the entire refractory is achieved. Can be held. In a general high-degree-of-freedom multi-joint mechanism, the base axis is set on the base side, and complicated and extensive control from the base mechanism is required. However, in the refractory repairing apparatus 11 of the present embodiment, the tip block 41 is used. By setting the rear part of the base as the base axis B, the spraying operation can be performed only by the tip mechanism, so that the control of the spray nozzle is facilitated and the spraying accuracy is improved.

Using the refractory repairing apparatus 11 of the present embodiment configured as described above, the refractory repairing method for a mixed iron car according to the present invention is performed as follows. FIG. 5 is a schematic diagram showing one embodiment of the method for repairing refractories of a mixed iron wheel vehicle of the present invention.
As shown in the figure, in the refractory repair method of the present embodiment, first, as shown in steps, a plurality of division zones are set on the surface of the refractory in the mixed iron wheel, and a repair thickness condition in each division zone is set. This division zone is set based on the past operation results of the mixed iron vehicle, and the repair thickness condition is set based on the actual wear state. In the present embodiment, for example, five division zones are set, the construction thickness of zone 1 is 30 mm, the construction thickness of zone 2 is 50 mm,
The construction thickness of zone 3 is 60 mm and the construction thickness of zone 4 is 40
mm and the construction thickness of the zone 5 are set to 40 mm. The division zone can be divided up to about 1000 zones, and the construction thickness is set in consideration of the wear rate etc.

Further, based on the past actual wear situation,
An expected wear pattern of the refractory is created and input to, for example, a microcomputer built in the control panel. Then, the pig iron receiving operation is started, and the actual operation is performed for a predetermined period under normal conditions.

After operation, the actual wear pattern of the refractory is measured by a profile meter as shown in the step. That is, the residual thickness measurement at the representative point of the refractory in the mixed iron wheel is performed by the profile meter. For example, 25 points on the circumference are scanned in about 40 cross sections, and the remaining thickness measurement of about 1000 points is performed. Then, an actual wear pattern is created from the measured remaining thickness at the representative point, and is input to, for example, a microcomputer built in the control panel.

Next, as shown in the step, the actual wear pattern is compared with the predicted wear pattern created in advance to determine the wear rate, and as shown in the step, for example, C
The image is displayed on an image display device such as an RT. The operator selects the optimal repair pattern by adding the know-how and intelligence accumulated in the display information. Alternatively, the optimum repair pattern is uniformly selected by the microcomputer.

Then, as shown in the step, the repair thickness condition is reset based on the optimum repair pattern, the number of times of receiving iron, etc., and as shown in the step, the automatic repair of the refractory is performed based on the thickness setting for each divided zone. I do. In addition, it is also possible to change the layout of the division zone in resetting the repair thickness condition, and by changing the division zone,
It is possible to optimize the repair thickness condition.

After the completion of the automatic repair, as shown in the steps, a confirmation measurement is performed at a representative point of the refractory constructed by a profile meter as necessary. For example, circumference 2
Five points are scanned in about 40 cross sections, and confirmation measurement of about 1000 points is performed. By repeating the repair cycle of the above steps, the technique for spraying the amorphous refractory is spirally improved, and optimization can be achieved.

After completion of the step, as shown in the step, the actual wear pattern is taken into the off-line three-dimensional simulator, the repair pattern and the actual wear pattern are compared with the simulation of the expected wear pattern, and the optimum repair pattern is selected. . That is, the actual wear pattern is taken into an offline three-dimensional simulator,
By selecting the optimal repair pattern, the simulator accuracy is improved, the service life of the repair is extended, the operation guide is achieved, and effective repair is possible. Then, as shown in the steps, the accumulated data of the off-line three-dimensional simulator contributes to the establishment of a universal repair technology, and is used for deployment to other places and engineering to other processes.

Thus, according to the refractory repair method of this embodiment, the actual wear pattern of the refractory is measured by the profile meter, so that the surface condition of the refractory of the mixed iron wheel can be quantitatively detected. Since the repair thickness condition of each divided zone is reset based on the selected optimal repair pattern, it is possible to manage the spray thickness on the entire refractory and achieve good construction quality by fully automatic repair. You can do it.

[0043]

As described above, according to the apparatus for repairing refractories of a pig iron wheel of the present invention, the relocation of the pig iron wheel to a receiving port, insertion from the receiving port to the inside of the pig iron wheel, and the formation of an irregular shaped refractory Is assigned to each block.
Automated repair work for irregular-shaped refractories in mixed-iron cars can be easily achieved, and since the rotation center of the spray nozzle is fixed to the base shaft, good construction quality can be maintained throughout the refractories. Things. Further, according to the method for repairing refractories of a piggyback wheel according to the present invention, the actual wear pattern of the refractory is measured by the profile meter, so that the surface condition of the refractory of the piggyback wheel can be quantitatively detected, and Since the repair thickness condition of each divided zone is reset based on the selected optimal repair pattern, it is possible to manage the spray thickness on the entire refractory and achieve good construction quality by fully automatic repair. You can do it.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an embodiment of a refractory repairing apparatus for a mixed iron wheel according to the present invention.

FIG. 2 is a schematic plan view showing the refractory repair apparatus of the present embodiment.

FIG. 3 is a schematic side view showing the refractory repair apparatus of the present embodiment.

FIG. 4 is an enlarged view of a main part showing a telescopic mechanism in the refractory repairing device of the present embodiment.

FIG. 5 is a schematic view showing one embodiment of a method for repairing a refractory of a mixed iron vehicle according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mixed iron wheel 2 pig iron receiving port 11 refractory repair device 21 base block 22 traversing means 23 gantry 24a, 24b trajectory track 26 running means 27a, 27b running track 28 drive unit 29 drive unit 30 rotation mechanism 31 intermediate block 32 lift unit 33 intermediate Feeder 34 First intermediate joint 35 Second intermediate joint 36 Drive device 40 Spray nozzle 41 Tip block 42 Telescopic mechanism 43 First distal feeder 44 First-stage telescopic mechanism 45 Second distal feeder 46 Second-stage telescopic Mechanism 47 Drive device 48 Drive device 49 Weight 50 Third distal feeder 51 First distal joint 52 Second distal joint 53 Rotating mechanism 54 Drive device B Base shaft

Claims (7)

[Claims] 1. A base block for guiding a spray nozzle to a pouring port position of a pig iron wheel, an intermediate block for inserting a blowing nozzle from the pouring port into the pig iron car, and a center of the pig iron wheel when blowing an irregular shaped refractory. A refractory repairing apparatus for a mixed iron wheel, comprising: a tip block for rotating a spray nozzle about a shaft. 2. The base block according to claim 1, wherein the base block is provided with traveling means for traveling along the longitudinal direction of the mixed iron wheel, traversing means for traversing along the width direction of the mixed iron wheel, and a rotation mechanism. The refractory repair equipment for a mixed iron car according to the description. 3. The refractory of a mixed-iron wheel according to claim 1, wherein the intermediate block is provided with elevating means for lowering the tip block to the center axis of the mixed-wheel wheel, and a plurality of rotatable joints. Equipment repair equipment. 4. The tip block is provided with a telescopic mechanism for expanding and contracting the tip block, a plurality of rotatable joints, and a rotating mechanism for rotating a spray nozzle around a central axis of the mixed iron wheel. The refractory repair apparatus for a mixed iron vehicle according to any one of claims 1 to 3. 5. A method for setting a plurality of division zones on the surface of a refractory in a mixed-iron car, setting a repair thickness condition in each division zone, and creating an expected wear pattern of the refractory, and setting a profile meter after the iron receiving operation. Measure the actual wear pattern of the refractory, compare the actual wear pattern with the expected wear pattern, select the optimal repair pattern, reset the repair thickness condition based on this, and based on this condition, A method for repairing refractories of a mixed iron wheel, characterized by automatically repairing the refractories. 6. The method for repairing a refractory of a mixed iron wheel vehicle according to claim 5, wherein the resetting of the repair thickness condition includes changing the division zone. 7. The method according to claim 5, wherein the actual wear pattern is taken into an off-line three-dimensional simulator, and an optimum repair pattern is selected.